public void GetAllQuestionsAsync_WhenNoQuestionsForSurveySearchedFor_ReturnsOkNoResults()
{
var response = _controller.GetAllQuestionsAsync(_nonMatchingGuid).Result;
_questionService.Verify(repo => repo.GetQuestionsBySurveyId(_nonMatchingGuid), Times.Exactly(1));
Assert.IsType <OkObjectResult>(response);
var options = ((OkObjectResult)response).Value as IList <ISurveyQuestion>;
Assert.Null(options);
}